Source Data Reference for:

City = Luoyang
Time = 800

City	Year	Size	Size Comment	Year Comment	Author	Title	Location
Luoyang	700	500,000			George Modelski	World Cities -3000 to 2000	p44
Luoyang	800	400,000			George Modelski	World Cities -3000 to 2000	p44
Loyang	800	300,000			Tertius Chandler	Four thousand years of urban growth	p467
Loyang	800	300,000			Tertius Chandler	Four thousand years of urban growth	p70
Loyang	800	200,000			Tertius Chandler	Four thousand years of urban growth	p528
Loyang	800	300,000			Tertius Chandler	Four thousand years of urban growth	p531